Stitch-forming mechanism for embroidering-machines.



A A. H. MEYER.

STITCH FORMING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATION FILED OCT. 6, I913- RENEWED DEC. 29. I9I6- Patented July 31,1917.

J 72 van 60/" fik w WiZnesses AUGUST- HERMANN MEYER, OF PLAUEN, GERMANY.

STITCH-FORMING MECHANISM FOR EMBROIDERING-MACHINES.

Specification of Letters Patent.

Patented J 11157 31, 19.17.

Application filed October-6, 1913, Serial No. 793,664.ReneWed-DecemberZB, 1916. 1 SeriaINo. 139,701.

To all whom it may concern:

Be it known that I, AUoUsT HERMANN MEYER, a subject of the GermanEmperor, residing at Plauen, Vogtland, in the Kingdom of Saxony andEmpire of Germany, have invented certain new and useful Improvements inStitch-Forming Mechanism for Embroidering-Machines, of which thefollowing is a specification.

The subject matter of the present invention has reference to animprovement in embroidery machines, whereby it is now made possible towork with endless threads upon both sides of the piece of embroidery.

The front part of the new embroidery machine does not differ at all fromthat of the constructional types of such machines already known, but therearside is not provided with shuttles but with a chain-stitching devicethe threads of which come from a spool and roller.

This chain-stitching device joins or fastens the front thread of a pieceof embroidery on the reverse side of the material.

In the accompanying drawings which are given by way of example Figure 1shows the combination of the various mechanical parts which are requiredin order to form each stitch.

Figs. 2, 3, 4, 5 and 6 show the method and manner in which the stitch ismade.

Fig. 7 is a side elevation showing a step in the formation of thestitch.

1 is the piece of material it is desired to embroider. 2 is the needle,while the looper 3 and the loo-per 4 form the chief parts of thechain-stitching device.

The needle 2 is brought into operation in the manner hitherto known, andcarries the thread 5 which is guided from the spool 6 over the roller 7and the two thread guides 8, 9.

The looper 3 is not guided horizontally but vertically. It is operatedby means of the axle 10 and the tappet device 11, the arrangement beingsuch that the movement is transmitted to the looper 3 by the roller 12,the tension rod 13, the lever 14, the leading bar 15 and the looperholder 16. The rear thread 17 is guided from the spool 18 over theroller 19 and the guide 20, which at the same time connects the lever 14with the bar 15.

Underneath the rear horizontally adjusted needle-plate 21 there is thelooper 4 which is operated by the conic wheels 22, 23 and the material1.

The needle 2 passes through the material to such an extent that the eyeof the said needle 2 takes up a position behind the point of the looper3. When the needle 2 begins its retrograde movement its thread 5 forms aloop as will be seen in Figs. 3, 4, 5 and 6.

Through this loop and the horizontal needle-plate 21 there now passesfrom above downward the looper 3 to such a length that its eye takes upa position a little below the point of the looper 4. As soon as thelooper 3 begins its retrograde movement its thread 17 also forms a loopas may be seen in Figs. 3, 4 and 6.

Through this latter loop now passes the point of the looper 4. Thelooper 4 makes the loop of the thread 17 larger and keeps it back tillthe needle 2 and looper 3 make the next stitch. Meantime both of theseparts have again taken up their primary position whereby the thread 5 ofthe needle 2 has been drawn tight so that it now forms merely a verysmall loop as may be seen in Fig. 7.

The material 1 is then moved on and the operation of the needleshereinbefore described is repeated. As soon as the point of the looperhas formed the new loop in the rear thread 17, it at once releases thepreviously formed loop which thereupon in the manner known binds the newloop. Conseuently, as will be readily understood, the front thread 5 isfastened by the rear thread 17, whereas the latter, 17 fastens itself.

As will be clear the new stitch can be made not only as a back-stitchbut also it may be used as a satin-stitch according as may be required.

Having now described my invention, and the manner in which it is to beemployed, what I claim as my invention is as follows 1. In a stitchforming mechanism for embroidering machines, a horizontallyreciprocating needle, means to guide the sewing thread to said needle, avertically reciprocating thread carrying looper supported rearward ofthe material, an axle, a tappet on said axle, a tension rod operated bysaid tappet, a lever connecting said tension rod to said looper andmeans for enchaining loops of the thread carried by said thread carryinglooper.

2. In a stitch forming mechanism for embroidering machines, ahorizontally reciprooating needle supported at the front of the loops ofthe thread carried by said thread material, thread guides for guidingthe sewcarrying looper. 10 ing thread to said needle, a verticallyreeip- In testimony whereof I affix my signature roeating threadcarrying looper supported in presence of two witnesses.

rearward of the material, an axle, a tappet AUG. HERMANN MEYER.

on said axle, a tension rod operated by said Witnesses:

tappet, a lever connecting said tension rod R. KoLLER,

to said looper and means for enehaining ROBERT H. NIER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

